 Campbell went on to become Professor of Obstetrics & Gynaecology at St George's Hospital Medical School before his retirement.He was founding President of the International Society of Ultrasound in Obstetrics & Gynecology (ISUOG), and the first editor of the journal "Ultrasound in Obstetrics & Gynecology" (The White Journal), one of the leading peer-reviewed journals on imaging within obstetrics and gynaecology.In 1992 he was awarded the Ian Donald Gold Medal of ISUOG in recognition of his contribution to ultrasound in obstetrics & gynecology, with over 400 peer-reviewed publications to his name at the time.